666527 has 2 divisors, whose sum is σ = 666528. Its totient is φ = 666526.

The previous prime is 666511. The next prime is 666529. The reversal of 666527 is 725666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666527 - 2⁴ = 666511 is a prime.

Together with 666529, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 666493 and 666502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333263 + 333264.

It is an arithmetic number, because the mean of its divisors is an integer number (333264).

2⁶⁶⁶⁵²⁷ is an apocalyptic number.

666527 is a deficient number, since it is larger than the sum of its proper divisors (1).

666527 is an equidigital number, since it uses as much as digits as its factorization.

666527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 666527 is about 816.4110484309. The cubic root of 666527 is about 87.3519455440.

The spelling of 666527 in words is "six hundred sixty-six thousand, five hundred twenty-seven".